借助HTML5 Canvas API制作一个简单的猜字游戏

}

function canvasSupport() { return Modernizr.canvas;

}

function canvasApp() { var guesses = 0;

var message = "Guess The Letter From a(lower) to z(higher)"; var letters = ["a","b","c","d","e","f","g","h","i","j","k","l",

"m","n","o","p","q","r","s","t","u","v","w","x","y","z"]; var today = new Date();

var letterToGuess = ""; var higherOrLower = "";

var letterGuessed = []; var gameOver = false;

if(!canvasSupport()) {

return; }

var theCanvas = document.getElementById("canvas_guess_the_letter");

var context = theCanvas.getContext("2d");

initGame();

function initGame() { var letterIndex = Math.floor(Math.random() * letters.length);

letterToGuess = letters[letterIndex]; guesses = 0;

lettersGuessed = []; gameOver = false;

window.addEventListener("keyup", eventKeyPressed, true); var formElement = document.getElementById("createImageData");